Woodworking-machine.



T. LUND.

WOODWORKING MACHINE.

APPLICATION FILED 00mm, 1911 1,131,719. Patented Mar. 16, 1915.

2 SHEETSSHEBT 1.

W/T/VESSES. 4 'm a Z 1/ T. LUND.

WOODWORKING MACHINE.

APPLICATION FILED OGT.27, 1911.

1,131,719. Patented Mar.16, 1915.

2 SHEETS-SHEET 2.

W/T/VESSESL @M'A Fig.2. m 4 V THE NORRIS PETERS CO, PHOTOLITHO., WASHINGTON. D. c.

THOMAS LUND, OF BEVERLY, MASSACHUSETTS, MACHINERY COMPANY, OF PATERSON, NEW

NEW JERSEY.

ASSIGNOR TO UNITED SHOE JERSEY, A CORPORATION OF.

WOODWORKING-MACHINE.

Specification of Letters Patent.

Patented Mar. 16, 1915.

Application filed October 27, 1911. Serial No. 657,142.

To all whom it may concern:

Be it known that I, THOMAS LUND, a citizen of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Improvements in Woodworking-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to machines for working wood, metal and other materials, and is of special utility when embodied in shoe machinery, as for example in a machine for turning lasts for shoes, although I contemplate the use of my improvements in any field for which they are adapted by their nature.

An important object of my invention is to provide such apparatus with mechanism to permit the use of a single model last in the production of both right and left lasts, thus avoiding the usual discrepancies in contour between rights and lefts designed to be symmetrical, but which actually exhibit considerable variations due to the practical impossibility of securing identical right and left patterns, for which discrepancies the personal equation of the workman is primarily responsible, particularly when the pattern last has to be modified, as is often the case, by the addition to it of pieces of leather applied for the purpose of filling out the contour here and there. Such pieces rarely are made exactly symmetrical, and the result in the shoe is the cause of great discomfort to the wearer, or impairs the attractive appearance of the shoe.

Another important object of my invention is to construct and arrange the aforesaid mechanism so that the right and left lasts can be produced simultaneously, and by the provision of duplex mechanism for this purpose I am enabled to double the output of the machine, practically, for at present it is the usual practice to turn out first the rights and thereafter the lefts of the lasts in a given series. I save also the time expended in adjustment of the pattern lasts when changing from rights to lefts.

Among other objects of my invention is to construct and arrange the duplex mech anism so that its operation will be exact,

positive, and subject to the various automatic adjustments usually provided in machines of the character described, including the grading mechanism ordinarily utilized. Still another object of notable importance is to minimize the unfavorable effect of those variations in operation which occur even with the most skilled operation of turning machines, such unfavorable effect being enhanced when the variations in lasts produced by successive operations are variations between mate lasts of a pair; the effect of variations being less important where they exist in different grades, so long as the mates of each pair are symmetrical, and such perfect symmetry is attainable by my improved duplex mechanism.

Accordingly, into effect, I prefer to provide a machine for performing operations analogous to the turning of lasts, and having a blank-supportmg mechanism, such as a swinging frame under the control of a model-supporting mechanism, with a duplex blank-supporting swinging frame or mechanism, these frames being suitably connected, as by a toggle lever, with each other, and both connected positively, as by pinions and shafts, with the model-supporting mechanism, one frame on each side of the rotary cutter or other operating device, so that as the model traverses the pilot, opposite symmetrical modeling movements are communicated to the swinging frames and the blanks are moved thereby toward and from the cutter to reproduce the form of the model in direct contour in one blank, and in reverse contour in the other.

The various features of my invention will be illustrated and described fully in the accompanying drawings and specification, and pointed out in the claims.

In the drawings, Figure 1 is a View in perspective of a last-turning machine in the construction of which mv improvements have been embodied; and Fig. 2 is a fragmentary view in vertical section, on the plane indicated by line X Fig. 1, looking from right to left, and upon an enlarged scale, showing the duplex blank-supporting mechanism forming part of the machine illustrated in Fig. 1.

In the embodiment of my invention se lected for illustration and description to enin carrying my invention able ready and complete understanding of talities of such machines, and takes in the instance illustrated the form of a wellknown type of lathe bed, having a carriage 2 provided with uprights 3 in which is mounted the shaft 4: carrying thestock work-' ing device 5, this stock working device being of any suitable character according to the work to be performed, and consisting in the instance illustrated of a well-known form of rotary cutter, the'chips from which may be carried off by suitable means, as for example by the exhaust pipe 7. Suitable means are also provided to actuate the cutter, as for example the belt shown at 6 running around a pulley 8 to a drum 9 upon the main driving shaft 109. g

The reference numerals 14, 16, and 18 designate respectively a worm wheel, worm shaft and pulley constituting part of the well-known mechanism provided ordinarily in such machines for effecting the trav' ersing movement of the cutter carriage 2 necessary to move the cutter along the blank for treatment of every portion thereof. The pulley 18 is arranged to be driven by a belt 19 running from a pulley 20 on a countershaft 21, which has speed changing pulleys 22 driven in turn by a belt 23 which derives its power from variable speed pulleys 2st on a shaft 51 providedwith other speed-changing pulleys 25, to which runs a belt 26 from pulleys 27 on a shaft 28, the latter being driven by belts 11 run at the'other endof the frame, from a pulley 1O carried'by the main driving shaft 109, and a pulley 13 on the main driving shaft 109' may receive its actuation from any suitable source of power, not shown.

The above recited parts may be, and preferably are, all substantially as in use at the present day in existing machines of this type, and so also may in general be the means for supporting the model, whatever the character of the latter, and as one convenient form of such model-supporting means I have shown at 30, near the front of the apparatus, frame swinging on arms 32 from a shaft 34 mounted in bearings 36 in overhead arms 38 of which there is any suitable number, and preferably I provide one of these arms at each end of the machine and also an auxiliary supporting member 39 at ornear the middle of the frame.

The frame 30 is shown as having the usual live and dead lathe centers 33 and 35, to receivea model, such as a last, in well-known fashion, and the reference numerals 40, 11, 42, 43, 44:, 45, and 46, designate respectively pinions, shafts and gears connecting the center 33 with a suitable source of driving power such as the shaft 34:, driven by the shaft 51 through a belt 49 on pulleys 18 and 50.

At 52 I have shown a well-knownform of pilot wheel to be engaged by the model carried in the centers 33,35 as the frame 30 swings, the pilot being adjustable on a frame '53 which traverses the model by movement of a carriage 54 on ways 55, the movements oi the carriage 54' corresponding to the traversing movements of the cutter 5 with its carriage 2, the carriages 2 and 545 being connected in tandem by an adjusting link in two parts 66, 67 connected by a thumb screw 68, the link extending from a post 56 on car riage 2 to a pivotal connection 65 with a sliding block 6 1 secured by a thumb screw 58 in adjusted position upon a well-knownfo'rm of controlling handle lever 59" for lengthgrading, this handle lever deriving its support from a pivot 60 mounted adjustably on an arm 61 depending from the lathe-bed and braced at 62, the pivot 60 being secured in adjusted position the thumb-screw 63, as commonly provided for in such apparatus.

The reference numerals 159, 160, 161', 162, 163, 16% and 165 designate the various members of a grading apparatus common to ma-' chines of this type, and which need not be explained in detail, as its construction and operation is familiar to those skilled in the art, the'lever 165 which forms part of this grading apparatus being provided with a link 167 connected adjustably with the arm 165 at 166, and connected pivotally at 168 with the frame 30, whosemovements it regulates. The frame 30 ismoved normally to ward cutter 5 by the links '97 pivotally connected at 99with frame 30, and ac'tuated by arms 95 on a shaft 93 provided with a coral ter-weight 98 (see Fig. 2).

In machines of the type selected for illu s tration byway of example it is usual to support the last-blank (not shown) upon the frame 30 in centers 7 2, 7-1-- carried adjustably by slides 76, 78, having fastening or adjust ing devices 80, 82, 84:, the center 72 being ad justable axially bymeans of hand wheel 86- in well-known fashion, and preferably the center 74; will be actuated positively bypinion S8 driven positively by a coiiperat'ing pinion90 mounted on, and actuated by, a shaft 92, on the other end of which is the pinion 11 which drives the pinion 40actuating the center 33, sothat thus the centers of the model and of the blank are actuated at the same speed. In accordance with my invention I provide duplex mechanism to permit the production simultaneously v of right and left forms, such as lasts, by the treatment of two blanks. mounted for symmetrical presenta-' tion to the cutter device 5, under the control of the single model working inthe centers 33, 35, as herelnbefo-re. described, and any suitable mechanism may be adopted for this purpose. As one convenient form of such mechanism I have shown swinging arms 132 mounted upon a shaft 131 carried by suitable bearing members 136 of the overhead arms 38 and 39, these arms 132 forming part of a frame 130 provided with centers 172, 17 1, (see Fig. 2) carried by slides 178, similar in construction and function to the parts 72, 7 1, 76 and 73 already described, but arranged oppositely so that the blank carried between the centers 172, 174-, will be treated. by the cutter 5 in a manner symmetrical with the treatment of the blank carried by the centers 72 and 7 1. is one convenient form of mechanism to control the frame 130 to produce such symmetrical treatment of the blank between the centers 172 and 17%, I have shown a toggle connection, comprising arms '200 and 202 connected respectively with the frames 30 and 139, this toggle having a pivot 20a so that every movement of the arm 32 will be accompanied by a similar movement in the opposite direction of arms 132, the arms approaching and receding from each other as the frame 30 is moved under the influence of the model between the centers 33, 35, the latter model being held in contact in the usual fashion with the pilot wheel 52, as already described, as by a weighted lever 98 on a crank shaft 93 linked to each end of the frame 30 at 99.

I prefer to provide for the rigid and accurate positioning of the slide 206 carrying the toggle pivot 204 by mounting the slide in a vertically slotted head or heads 208 carried by frame arms 210 projecting from horizontal frame members 212.

The reference-numeral 186 designates a controlling wheel for the center 172, and in general the frame 130 may be, and preferably is, provided With devices for the control of the blank between the centers 172, 174., similar to those already described with reference to the operation of frame 30, for example, the center 174 is connected (see Fig. 2) by bevel gears 14:2, 143, shaft 144:, bevel gears 14:5 and 146 and shaft 134 with a gear 147 in mesh with the gear 47 on the shaft 34: heretofore described, so that the blank between the centers 172 and 174: is rotated positively in exact synchronism with the blank between the centers 72, 74 and therefore in synchronism with the model between the centers 33, 35.

The frame 130 need not be as long as the frame 30, since its function is primarily to carry and operate the duplex blank between the centers 172 and 174C, and thus it will be seen that in accordance with my invention by this simple duplex mechanism for the right and left blanks I am enabled to equip existing machines in such a manner as to double their capacity without displacing, or interfering with the operation of, the essential parts of such machines, and am able to avail of the respective adjustments and variations of operation of which the machine selected for illustration by way of example is capable ordinarily.

In the operation of my improved lastturning machine, the centers 33-35 and 72, 74 being in the position illustrated, with the other parts substantially as shown, a model last is inserted in usual fashion between the centers 33, 35, and a lash-blank is placed between the centers 74, 75, the grading mechanism being adjusted in well-known fashion by manipulation of the grading levers, 59 and 159 with their related parts; a duplex last-block is inserted also between the centers 172, 17 1, in the swinging frame 130 on the opposite side of cutter 5, for treatment of the duplex last-blank simultaneously and symmetrically with respect to the primary last-blank, although, if preferred, under certain circumstances the symmetrical treatment of the duplex last-blank between centers 17217 l may be effected quite independently of any treatment of a last-blank between centers 727 1. The machine is then started in the usual manner, by shifting belt 13, the rotation of the mainactuating shaft 109 acting through the belt 6 to drive cutter 5, and acting through pulleys, belts, shafts and gears 10, 11, 28, 27, 96, 25, 2a, 51, 50, 49, as, 34, 134, 47, 147, 4.6, at, 4:4, 43, 12, 11, 40, also 92, 90, 88 and 1 1-6, 145, 14%, 143 to drive the centers 33, 74 and 174, hus rotating the model in synchronism with the primary and duplex last-blanks. The frame 30 is preferably allowed by the operator to swing freely, being drawn into engagement with pilot 52 by the link 97 under the pull of weight 98 acting through shaft 93 and crank arms 95, the cutter 5 operating on the primary last-blank, under the control of the model in cooperation with pilot 52, while simultaneously the frame 130 is moved symmetrically by the toggle-device 200, 202, 204, 206 for the opposite presentation of the duplex last-blank, between centers 172, 174: and the operation thereupon by the opposite side of cutter 5, the result eing a pair of right and left symmetrical, mated lasts, embodying respectively, in reverse, the identical contour of the model.

Having illustrated and described my invention thus fully and suitable means by which the same may be carried into effect, I wish it understood that I do not limit myself to the materials and structural forms illustrated and described by way of example, nor in general do I limit myself otherwise than as set forth in the claims read in connection with this specification.

What I claim and desire to secure by Letters Patent is 1. Apparatus of the class described, comprising stock working mechanism, modelduction of forms in duplicate graded series Comprising symmetrical mates in pairs.

2. In a machine of the class described, a,

support comprising a bed and overhanging arms, a stock working device and its carriage movable horizontally upon said bed, actuating shafts supported by said arms, duplex swinging frames depending from said overhead arms on each side of said stock-working device, and connected for op posed movements relatively thereto, a blanksupporting means carried by said frames respectively and connected operatively with said shafts, one of said frames being provided also with model-supporting mechanism, connected actuatively in tandem relation with said blank-moving mechanism,

a model-controlling device opposite the poring part of said blank-supporting, duplex counter shaft with bevel-gears above and below, the latter gear meshing with said bevel-gear on said horizontal shaft, an upper horizontal shaft having a bevel-gear meshing with said upper bevel-gear of said upright shaft. and a second upper horizontal shaft in alinement with the center of said duplex swinging frame, gears connect.- ing said upper shafts for opposite rotation, a second upright shaft on said duplex swinging frame, having upper and lower bevel-gears, and bevel-gears on said second upper shaft and said duplex blank center respectively in mesh with said bevel-gears on said duplex upright shaft, and means to drive one of said upper shafts, to rotate said centers in synchronism.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

THOMAS LUND.

lVitnesses:

JOHN H. MCCREADY, EMILE, H. TARDIVEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, I). C. 

